I'll say it again-

Mercedes NEVER put bronze exhaust guides in diesel engines. They are a steel/iron alloy. Period! Some machinist's opinion that aftermarket bronze guides are superior to the factory stuff. I've always had the best luck with internal engine parts from the factory! Don't get me started on Lemforder!!!

You can do valve seals or if the car has sufficent mileage- a valve job. I would use factory parts here- gasket, and valve guides. I've seen bad aftermarket parts where the ID and OD were not concentric. Not worth the problems over saving 5-10 bucks total.

Gasket is similarly an issue. In addition the factory has a great warrentee policy, so it's definately worth it.

For a engine example with cast in guides, valve rotators and sodium filled exhaust guides: GMC V6 engines- 305, 351, 401, 478 gas and diesels(351d?) from 1960-1979.


Michael

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Michael McGuire
83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E